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  3. Vaginal Microbiota #18
Gynecology

Vaginal Microbiota #18

Gynecology
Gynecology

By Pr. Satu Pekkala
Academy of Finland Research Fellow, Faculty of Sport and Health Sciences, University of Jyväskylä, Finland

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Microbiota 18_bandeau revue press VAGINAL

About this article

Created 07 June 2023
Updated 08 June 2023

PREGNANCY AND COVID-19: IS VAGINAL DYSBIOSIS A SOURCE OF COMPLICATIONS?

Deng H, He L, Wang C, et al. Altered gut microbiota and its metabolites correlate with plasma cytokines in schizophrenia inpatients with aggression. BMC Psychiatry 2022; 22: 629.

And what if the harmful effects of Covid-19 in pregnant women required the intervention of the vaginal microbiota? In order to check this hypothesis, researchers conducted a prospective case-control study including 28 non-infected pregnant women and 19 pregnant women suffering from Covid-19. A sample of the vaginal microbiota was obtained with a swab during the active phase of the disease in the month following recovery and evaluated by 16S rRNA gene sequencing. The Covid-19 group displayed significantly greater diversity than the control group. In addition, the Bacteroidetes had gained the upper hand over the Firmicutes, and, at bacterial genus level, the Lactobacillus sp. were significantly less abundant than in the control group. Well, previous studies showed that there was an increased risk of miscarriage or premature birth in pregnant women whose vaginal microbiota were depleted in Lactobacilli. These data corroborate this finding, since 3 women in the Covid-19 group gave birth prematurely (versus 0 in the control group). Despite the small size of the sample, the investigators observed other differences in the composition of the vaginal microbiota in the Covid-19 group. In particular, the women suffering from moderate to severe forms of Covid-19 displayed much higher levels of Ureaplasma spp.: 2.05% vs 0.1% in case of asymptomatic to mild forms. The genus Ureaplasma is involved in different gynecological infections (salpingitis, urethritis, and cervicitis), its over-representation in case of severe Covid-19 also argues in favor of an association of vaginal dysbiosis both with SARS-Cov-2 infection and risks of pregnancy complications. All the more as, in the 3 premature births that occurred in this study, 2 were in the moderate to severe Covid-19 subgroup (n=6). Thus, although this study does not allow the conclusion that a causal relationship exists, these results suggest that Covid-19 may trigger an unfavorable disruption of the vaginal microenvironment in pregnant women. This would be even more pronounced when the infection is severe, and could lead to an increased risk of complications, such as premature birth.

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Vaginal microbiota Pregnancy Covid-19 Dysbiosis

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    Created 07 June 2023
    Updated 08 June 2023

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